Jumpers and connectors
This topic provides specific information about the jumpers. It also provides some basic information about jumpers and switches and
describes the connectors on the various boards in the system. Jumpers on the system board help to disable the system and setup
passwords. You must know the connectors on the system board to install components and cables correctly.
Topics:
• System board jumper settings
• System board connectors
• Disabling a forgotten password
System board jumper settings
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and
simple repairs as authorized in your product documentation, or as directed by the online or telephone service and
support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow
the safety instructions that came with the product.
For information on resetting the password jumper to disable a password, see the Disabling A Forgotten Password section.
Table 27. System Board Jumper settings
Jumper Setting Description
PWRD_EN
(default)
The password feature is enabled (pins 1–2).
The password feature is disabled (pins 2–3).
NVRAM_CLR
(default)
The configuration settings are retained at system boot (pins 2–3).
The configuration settings are cleared at the next system boot. (pins 1–
2).
Related References
Disabling a forgotten password on page 126
8
124 Jumpers and connectors
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